Cover noodles with boiling water.,Soak 20 minutes or until soft but not fully "cooked".,Drain and set aside.,In a small non-reactive bowl whisk together lime juice, water, fish sauce, rice vinegar, sugar, cayenne, and oil.,Set aside.,______,Turn heat to medium high and cook until shrimp is mostly pink about 3 to 4 minutes.,Add eggs, stir and scramble until just moist.,Add noodles, fish sauce mixture, peanuts, sprouts and scallions.,Using a pair of tongs or 2 large spoons, toss until noodles are evenly coated.,Add the cilantro.,Cook tossing constantly until noodles are tender and sauce has thickened slightly, about 3 to 4 minutes more.,Serve immediately.